Answers

Subtract 10/90 from 72/70

1^st number: 1 2/70, 2^nd number: 10/90

72/70 - 10/90 is 289/315.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 70 × 9 = 630,
   72/70 = 72 × 9/70 × 9 = 648/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   10/90 = 10 × 7/90 × 7 = 70/630
4. Subtract the two like fractions:
   648/630 - 70/630 = 648 - 70/630 = 578/630
5. After reducing the fraction, the answer is 289/315

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